keyword
MENU ▼
Read by QxMD icon Read
search

Quantitative radiology

keyword
https://www.readbyqxmd.com/read/28644061/diffusion-weighted-magnetic-resonance-imaging-in-the-assessment-of-choroid-plexus-aging
#1
Banu Alicioglu, Guliz Yilmaz, Ozgur Tosun, Nail Bulakbasi
Recent studies have pointed out dysfunction and histopathological changes of the choroid plexuses (CPs) with aging. This paper reviews apparent diffusion coefficient (ADC) values of the CPs for age-related changes. All the brain MR images of the patients between January 2013 and June 2014 in our Radiology Department were retrospectively investigated. Patients with major cranial abnormalities (brain tumors, hyperacute or acute ischemia, developmental anomalies, hemorrhage, hydrocephaly) were excluded. Diffusion-weighted images were obtained at the parameter values of b = 1000 s/mm(2) in the axial plane...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28639186/computerized-prediction-of-radiological-observations-based-on-quantitative-feature-analysis-initial-experience-in-liver-lesions
#2
Imon Banerjee, Christopher F Beaulieu, Daniel L Rubin
We propose a computerized framework that, given a region of interest (ROI) circumscribing a lesion, not only predicts radiological observations related to the lesion characteristics with 83.2% average prediction accuracy but also derives explicit association between low-level imaging features and high-level semantic terms by exploiting their statistical correlation. Such direct association between semantic concepts and low-level imaging features can be leveraged to build a powerful annotation system for radiological images that not only allows the computer to infer the semantics from diverse medical images and run automatic reasoning for making diagnostic decision but also provides "human-interpretable explanation" of the system output to facilitate better end user understanding of computer-based diagnostic decisions...
June 21, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28637959/examination-of-dose-reduction-using-image-noise-reduction-technology-in-cardiovascular-x-ray-systems
#3
Takaya Saijo, Shigenobu Seguchi
The aim of this study is to establish radiation exposure dose reduction protocols during cardiac intervention by decreasing the entrance dose at flat panel detector (FPD) with image quality evaluations. For measuring entrance surface dose (ESD), we have used a Radical 9015 dosimeter (6 cc ion chamber) placed under 20 cm thick acrylic plates at the patient's entrance reference point. We performed an image quality assessment based on quantitative as well as visual evaluation of the images obtained via current and dose reduction protocols...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28632553/lumbar-retrolisthesis-in-aging-spine-what-are-the-associated-factors
#4
Feng Zhu, Hongda Bao, Zhen Liu, Zezhang Zhu, Shouyu He, Yong Qiu
STUDY DESIGN: A retrospective radiographic study. OBJECTIVE: The aim of this study is to demonstrate that lumbar retrolisthesis serves as an important compensatory mechanism and to identify the possible factor related to lumbar retrolisthesis. SUMMARY OF BACKGROUND DATA: Lumbar instability is one of the common degenerative changes, which presents as 2 radiologic features: anterolisthesis and retrolisthesis. Compared with the extensive studies on anterolisthesis, limit data are available on the characteristics and clinical relevance of lumbar retrolisthesis...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28624924/evaluation-of-hepatic-fibrosis-a-review-from-the-society-of-abdominal-radiology-disease-focus-panel
#5
REVIEW
Jeanne M Horowitz, Sudhakar K Venkatesh, Richard L Ehman, Kartik Jhaveri, Patrick Kamath, Michael A Ohliger, Anthony E Samir, Alvin C Silva, Bachir Taouli, Michael S Torbenson, Michael L Wells, Benjamin Yeh, Frank H Miller
Hepatic fibrosis is potentially reversible; however early diagnosis is necessary for treatment in order to halt progression to cirrhosis and development of complications including portal hypertension and hepatocellular carcinoma. Morphologic signs of cirrhosis on ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) alone are unreliable and are seen with more advanced disease. Newer imaging techniques to diagnose liver fibrosis are reliable and accurate, and include magnetic resonance elastography and US elastography (one-dimensional transient elastography and point shear wave elastography or acoustic radiation force impulse imaging)...
June 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28612190/correction-of-hypokyphosis-in-thoracic-adolescent-idiopathic-scoliosis-using-sublaminar-bands-a-3d-multicenter-study
#6
Brice Ilharreborde, Sébastien Pesenti, Emmanuelle Ferrero, Franck Accadbled, Jean-Luc Jouve, Jérôme Sales De Gauzy, Keyvan Mazda
INTRODUCTION: The comparison of implants and correction methods remain controversial in AIS. Excellent frontal and axial correction rates have been reported with all-screw constructs, but at the expense of sagittal alignment, which has a tendency to flatten postoperatively. Posteromedial translation using hybrid constructs seems to preserve and improve thoracic kyphosis (TK), but no series exist to date with a significant number of hypokyphotic patients. In addition, the measures of TK in 2D are often wrong in severe AIS due to axial rotation...
June 13, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28600853/mixed-methods-study-on-the-use-of-and-attitudes-towards-safety-checklists-in-interventional-radiology
#7
Zachary Munn, Kristy Giles, Edoardo Aromataris, Anita Deakin, Timothy Schultz, Catherine Mandel, Micah Dj Peters, Guy Maddern, Alan Pearson, William Runciman
INTRODUCTION: The use of safety checklists in interventional radiology is an intervention aimed at reducing mortality and morbidity. Currently there is little known about their practical use in Australian radiology departments. The primary aim of this mixed methods study was to evaluate how safety checklists (SC) are used and completed in radiology departments within Australian hospitals, and attitudes towards their use as described by Australian radiologists. METHODS: A mixed methods approach employing both quantitative and qualitative techniques was used for this study...
June 10, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28595812/beyond-imaging-the-promise-of-radiomics
#8
REVIEW
Michele Avanzo, Joseph Stancanello, Issam El Naqa
The domain of investigation of radiomics consists of large-scale radiological image analysis and association with biological or clinical endpoints. The purpose of the present study is to provide a recent update on the status of this rapidly emerging field by performing a systematic review of the literature on radiomics, with a primary focus on oncologic applications. The systematic literature search, performed in Pubmed using the keywords: "radiomics OR radiomic" provided 97 research papers. Based on the results of this search, we describe the methods used for building a model of prognostic value from quantitative analysis of patient images...
June 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28572534/contrast-media-enhancement-reduction-predicts-tumor-response-to-presurgical-molecular-targeting-therapy-in-patients-with-advanced-renal-cell-carcinoma
#9
Shogo Hosogoe, Shingo Hatakeyama, Ayumu Kusaka, Itsuto Hamano, Yoshimi Tanaka, Kazuhisa Hagiwara, Hideaki Hirai, Satoko Morohashi, Hiroshi Kijima, Hayato Yamamoto, Yuki Tobisawa, Tohru Yoneyama, Takahiro Yoneyama, Yasuhiro Hashimoto, Takuya Koie, Chikara Ohyama
BACKGROUND AND OBJECTIVE: A quantitative tumor response evaluation to molecular-targeting agents in advanced renal cell carcinoma (RCC) is debatable. We aimed to evaluate the relationship between radiologic tumor response and pathological response in patients with advanced RCC who underwent presurgical therapy. RESULTS: Of 34 patients, 31 underwent scheduled radical nephrectomy. Presurgical therapy agents included axitinib (n = 26), everolimus (n = 3), sunitinib (n = 1), and axitinib followed by temsirolimus (n = 1)...
May 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28570095/differentiating-transudative-from-exudative-ascites-using-quantitative-b-mode-gray-scale-ultrasound-histogram
#10
Bulent Çekiç, Iclal Erdem Toslak, Yasin Şahintürk, Ayhan Hilmi Cekin, Yasemin Kocabas Koksel, Mert Koroglu, Terrence C Demos
OBJECTIVE: The purpose of this article is to differentiate exudative from transudative ascites using B-mode gray-scale ultrasound histogram analysis. SUBJECTS AND METHODS: Sixty-two consecutive patients with ascites were prospectively studied from June 2014 through June 2015. All underwent ultrasound (US) and paracentesis in the radiology department. Five patients were excluded (three with hemorrhage and two with peritoneal carcinomatosis). The remaining 57 patients were divided into those with exudative and transudative ascites according to results of paracentesis...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28555423/improving-the-utility-of-1-h-mrs-for-the-differentiation-of-glioma-recurrence-from-radiation-necrosis
#11
Ian D Crain, Petra S Elias, Kristina Chapple, Adrienne C Scheck, John P Karis, Mark C Preul
Proton magnetic resonance spectroscopy ((1)H-MRS) has shown promise in distinguishing recurrent high-grade glioma from posttreatment radiation effect (PTRE). The purpose of this study was to establish objective (1)H-MRS criteria based on metabolite peak height ratios to distinguish recurrent tumor (RT) from PTRE. A retrospective analysis of magnetic resonance imaging and (1)H-MRS data was performed. Spectral metabolites analyzed included N-acetylaspartate, choline (Cho), creatine (Cr), lactate (Lac), and lipids (Lip)...
May 29, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28551930/-laboratory-tests-and-radiological-imaging-diagnostic-tools-that-share-information-and-can-be-functionally-integrated
#12
Michael Mayer
In spite of apparent disparity between the specialties of radiological imaging, pathology and laboratory analysis, the medical diagnostic information that these sources provide have a lot in common and can be effectively utilized by sharing quantitative and qualitative results through modern information technology processes. Informaticsbased integration of radiological imaging, digital images of anatomical and molecular pathology and clinical laboratory results enables earlier, more sensitive and precise diagnosis, resulting in the more efficient treatment of patients...
March 2017: Harefuah
https://www.readbyqxmd.com/read/28537788/the-precision-of-hepatic-arterial-infusion-scintigraphy-as-a-quantitative-biomarker-of-tumor-microvasculature
#13
Mark Dunphy, Neeta Pandit-Taskar, Josef J Fox, Nancy Kemeny
OBJECTIVE: Optimal clinical development of new cancer therapies targeting tumor vasculature requires new target-specific response assays. This clinical study examined the test-retest repeatability of SPECT as an in vivo assay of angiogenic hepatic tumor microvasculature using an intraarterial infusion of (99m)Tc-macroaggregated albumin (MAA) delivered via a hepatic artery infusion (HAI) pump. MATERIALS AND METHODS: Patients with primary or secondary cancerous liver tumors with HAI pump-catheter implants placed for HAI chemotherapy underwent hepatic SPECT after separate arterial infusions of 37 and 185 MBq of (99m)Tc-MAA via an HAI pump...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28536768/quality-measures-and-pediatric-radiology-suggestions-for-the-transition-to-value-based-payment
#14
REVIEW
Richard E Heller, Brian D Coley, Stephen F Simoneaux, Daniel J Podberesky, Marta Hernanz-Schulman, Richard L Robertson, Lane F Donnelly
Recent political and economic factors have contributed to a meaningful change in the way that quality in health care, and by extension value, are viewed. While quality is often evaluated on the basis of subjective criteria, pay-for-performance programs that link reimbursement to various measures of quality require use of objective and quantifiable measures. This evolution to value-based payment was accelerated by the 2015 passage of the Medicare Access and CHIP (Children's Health Insurance Program) Reauthorization Act (MACRA)...
June 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28516046/image-quality-assessment-of-a-1-5t-dedicated-magnetic-resonance-simulator-for-radiotherapy-with-a-flexible-radio-frequency-coil-setting-using-the-standard-american-college-of-radiology-magnetic-resonance-imaging-phantom-test
#15
Oi Lei Wong, Jing Yuan, Siu Ki Yu, Kin Yin Cheung
BACKGROUND: A flexible RF coil setting has to be used on an MR-simulator (MR-sim) in the head and neck simulation scan for radiotherapy (RT) purpose, while the image quality might be compromised due to the sub-optimized flexible coil compared to the normal diagnostic radiological (DR) head coil. In this study, we assessed the image quality of an MR-sim by conducting the standard American College of Radiology (ACR) MRI phantom test on a 1.5T MR-sim under RT-setting and comparing it to DR-setting...
April 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28515410/differentiating-between-central-nervous-system-lymphoma-and-high-grade-glioma-using-dynamic-susceptibility-contrast-and-dynamic-contrast-enhanced-mr-imaging-with-histogram-analysis
#16
Kazuhiro Murayama, Yuya Nishiyama, Yuichi Hirose, Masato Abe, Shigeharu Ohyu, Ayako Ninomiya, Takashi Fukuba, Kazuhiro Katada, Hiroshi Toyama
PURPOSE: We evaluated the diagnostic performance of histogram analysis of data from a combination of dynamic susceptibility contrast (DSC)-magnetic resonance imaging (MRI) and dynamic contrast-enhanced (DCE)-MRI for quantitative differentiation between central nervous system lymphoma (CNSL) and high-grade glioma (HGG), with the aim of identifying useful perfusion parameters as objective radiological markers for differentiating between them. METHODS: Eight lesions with CNSLs and 15 with HGGs who underwent MRI examination, including DCE and DSC-MRI, were enrolled in our retrospective study...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28508007/five-year-outcomes-after-treatment-for-acute-instability-of-the-tibiofibular-syndesmosis-using-a-suture-button-fixation-system
#17
Paul F Förschner, Knut Beitzel, Andreas B Imhoff, Stefan Buchmann, Georg Feuerriegel, Felix Hofmann, Dimitrios C Karampinos, Pia Jungmann, Jonas Pogorzelski
BACKGROUND: Suture-button repair is a widely accepted surgical treatment for acute and isolated ankle syndesmosis injuries. To our knowledge, midterm results have not previously been reported. PURPOSE: To evaluate the clinical, qualitative, and quantitative radiological midterm outcomes of suture-button repair after acute isolated ankle syndesmosis injuries. STUDY DESIGN: Retrospective case series; Level of evidence, 4. METHODS: Clinical outcomes were measured using the Foot and Ankle Disability Index (FADI) and the American Orthopaedic Foot and Ankle Society (AOFAS) score...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28501096/combined-diffusion-weighted-imaging-and-dynamic-contrast-enhanced-mri-for-differentiating-radiologically-indeterminate-malignant-from-benign-orbital-masses
#18
X-Q Xu, W Qian, G Ma, H Hu, G-Y Su, H Liu, H-B Shi, F-Y Wu
AIM: To evaluate the performance of the combination of diffusion-weighted (DW) and dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for differentiating radiologically indeterminate malignant from benign orbital masses. MATERIALS AND METHODS: Sixty-five patients with orbital masses (36 benign and 29 malignant) underwent DW and DCE MRI examinations for pre-treatment evaluation. The apparent diffusion coefficient (ADC) was derived from DW imaging data using the mono-exponential model...
May 10, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28491496/towards-in-vivo-focal-cortical-dysplasia-phenotyping-using-quantitative-mri
#19
REVIEW
Sophie Adler, Sara Lorio, Thomas S Jacques, Barbora Benova, Roxana Gunny, J Helen Cross, Torsten Baldeweg, David W Carmichael
Focal cortical dysplasias (FCDs) are a range of malformations of cortical development each with specific histopathological features. Conventional radiological assessment of standard structural MRI is useful for the localization of lesions but is unable to accurately predict the histopathological features. Quantitative MRI offers the possibility to probe tissue biophysical properties in vivo and may bridge the gap between radiological assessment and ex-vivo histology. This review will cover histological, genetic and radiological features of FCD following the ILAE classification and will explain how quantitative voxel- and surface-based techniques can characterise these features...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28484918/simplified-readability-metric-drives-improvement-of-radiology-reports-an-experiment-on-ultrasound-reports-at-a-pediatric-hospital
#20
Wei Chen, Claire Durkin, Yungui Huang, Brent Adler, Steve Rust, Simon Lin
Highly complex medical documents, including ultrasound reports, are greatly mismatched with patient literacy levels. While improving radiology reports for readability is a longstanding concern, few articles objectively measure the effectiveness of physician training for readability improvement. We hypothesized that writing styles may be evaluated using an objective two-dimensional measure and writing training could improve the writing styles of radiologists. To test it, a simplified "grade vs. length" readability metric is developed based on results from factor analysis of ten readability metrics applied to more than 500,000 radiology reports...
May 8, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
keyword
keyword
14091
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"